A study of semi-focal visual environment for visual tasks in office work using head mounted display virtual reality system

Necessary brightness by distance from the target for general office work was analyzed based on experiment results using head mounted display visual-reality-system that enables to show equal luminous chromaticity values as real environment omni-directionally. As for office works, we chose two tasks, i.e., writing-reading and PC monitor task. 15 participants were asked to evaluate 120 office scenes for writing-reading and 180 for PC monitor task from the viewpoints of (1) Work efficiency, (2) Appropriateness of ambience as office and (3) Possibility to continue to work 3 days in case of emergencies. We found the quantitative conditions related to visual environment.